You have my sympathies, Newbie, as a fellow newbie.
The basic problem is that TurboCAD is not at all intuitive, and procedures that work 3 or 4 times, say, don't always work on the 4th or 5th in the same session, or in the way their names and the manual implies.
I bought a training-video on CD along with the programme itself, but it soon proved erroneous, deleting the very first exercise part-way through with an instructed key-stroke that should have let me move to adding the next feature!
The on-line, .pdf manual doesn't really help you much. It tells you what things do, but not really how to make them do it, unless that's hidden somewhere not obvious.
If you try the on-line videos offered in the tool-bar 'Help' menu, they demand Adobe Flash Player. That opens an even deeper hexadecimal can of worms, because either your computer will accept AFP or it won't. Adobe's own users' forum reveals many won't, but the offered solutions demand understanding system files & structures, analysis tools, command-line procedures, etc. Make a mistake there and you risk disabling your computer.
At least you can struggle along in TurboCAD by trial-&-error, and mistakes at worst merely lose your drawing, or fail to draw what you intended.